下列每组物体中都是导体的选项是（）.
A.氧化铜、硒
B.陶瓷、塑料
C.大地、石墨
D.锗、硅
参考答案：C
We must try our best to do the work better with ______ money and ______ people. [ ]
A. little, fewer
B. fewer, less
C. less, fewer
D. less, few
